RAM Handlebar Rail Mount with Zinc Coated U-Bolt Base for the Garmin nuvi 200W, 205W, 250W, 255W, 260W, 265W, 265WT, 285WT & 465T RAM Handlebar Or Rail Mount For The Garmin nvi 200W, nvi 205W, nvi 250W, nvi 255W & nvi 260W. The zinc coated u-bolt base accommodates rails 0.75" To 1.25" in diameter.